What is the single greatest threat to biodiversity?

Answers

Answer 1

Answer:

Habitat loss

Explanation:

Habitat loss is the single greatest threat to biodiversity on Earth today and in fact it is the second largest threat to our existence on this planet next to Climate Change.


Related Questions

Name five types of evidence that support the theory of evolution. Write one sentence for each, explaining why it demonstrates evidence. (10 points)

Answers

The five evidences that support the theory of evolution are: Fossils, Anatomy, Embryology, Molecular Biology (or Biochemistry), and Biogeography.

Fossils show the physical change in a species over time, suggesting evidence for evolution. For an example, we can trace the origins of dolphins and whales all the way to a four-legged, dog-like hoofed mammal from about 50 mya. These mammals were fish eaters and so decided to spend a lot of time in the water. In fact, they spent so much time in the water, that in a few million years, they evolved a longer body and webbed feet. Then another few million years passed and they swapped their webbed feet for flippers and swapped their tail of a fin. Eventually, we get a fish-like mammal that once walked on land.

For anatomy, or structures, there's three types of structure comparisons: Homologous structures, Vestigial structures, and Analogous structures (or Convergent Evolution). Homologous structures show similarities between the structures between species, but serve different purposes. For an example, all mammals share common features within their arms, such as having 5 fingers. However, they serve different purposes, from whale fins for swimming, to bat wings for flying, to human hands for grabbing and for using tools.

Vestigial structures were structures that once served a purpose and have been reduced in size/power to the point where it's useless. For an example, large theropods such as the T. Rex spent so much time evolving more jaw muscles and biting power, that they sacrificed their arm muscles for such power. This explains why their arms were so short.

Another example would be ratites, flightless birds such as ostriches, emus, and cassowaries (penguins and kakapos are from a different group). They spent so much time evolving powerful legs as well as evolving in size, that there was no need to fly when they could just run with their improved legs. And also the fact that they're too heavy to even fly anyways.

Analogous structures is the similar functions of structures between species, but have separately evolved these functions. For an example, the wings from insects, birds, bats, and pterosaurs are very similar in shape and can be used to fly, but they've evolved separately. For an example, birds use feathers to fly while bats and pterosaurs use/used (pterosaurs are extinct) membrane between their bones to fly. Although they do have strikingly similar evolutionary histories, with their ancestors starting off as tree dwellers, they've evolved their flight abilities separately during different earth periods.

Embryology is evidence for evolution by using embryos from different species to suggest a common ancestor. For an example, we can prove that we're more related to whales than to fish by using embryos. The fish embryo will evolve gills while the embryos of humans and whales will not, since we do not breath by extracting oxygen from water.

Molecular biology is a more recent way of providing evidence for evolution. By taking the DNA from cells from different species, we can get an estimate of how related one species is to another. The more similar amino acid sequences are between species, the more recent their common ancestor is. For an example, by comparing amino acid sequences between humans and chimpanzees, we get an estimated amount that we once shared a common ancestor seven million years ago. Without molecular biology, we would still be digging for fossils to find that number.

Biogeography is the geographic distribution of species on earth that can be explained by evolution. For an example, we can tell that Australia separated first from Pangea rather than Asia or North America since Australia doesn't have bears while the Asia and North America do, with China having pandas and North America having brown and black bears. And also with the fact that Australia is the only continent with monotremes (egg-laying mammals like the platypus).

Similar to biogeography, there's also direct observation, which is evolution that has happened in our own eyes. An example would be the underground London mosquito. Mosquitoes usually target birds like pigeons. But after an underground tunnel was built in London, some mosquitoes managed to get inside and instead of birds, they targeted, mice, rats, and of course, humans. After only a few hundred years, a mosquito from the underground tried to mate with another mosquito from land and they could not, simply because they were different species. This shows that their new choice of feeding on mammalian blood has actually altered their DNA and created a new species, during the existence of humanity!

Why there is a variation of weather in two different parts of India, though climate
was summer?

Answers

Answer:

Due to distance from the equator.

Explanation:

There is a variation of weather in two different parts of India, though climate  was summer because both parts experience different amount of sunlight. There are some regions in India which is located on the equator so they experience very hot weather while on the other hand, some regions are present at a large distance from the equator so direct sunlight does not occur and the temperature is moderately warm.

What is a genotype???????

Answers

Answer: A genotype is an individual's collection of genes.

Explanation:

What part of the membrane do you think would allow the red tip of the tube worm to send signals to the rest of its body?

Answers

Answer:

neurons

Explanation:

I was reading an article and that was the only thing that really stood out...

⇒ What is ethnobiology?

Answers

Answer:

Ethnobiology is the scientific study of dynamic relationships among peoples, biota, and environments. ... The diversity of perspectives in ethnobiology is our greatest strength.

it is the scientific study if dynamic relationship between people,biota and environment

Explain why a diagram of the tree of life is difficult to construct. ​

Answers

Answer:

Because of how genes change and how quickly they change, evolution is complicated. At the start of evolution, there shouldn't be a straight tree branch—it should be a twisted mess.

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Your service club is offering a prize for the best community educational plan. Not only would you love to win the prize, but you think this is a good opportunity to advocate against ATOD abuse. You know that ATOD abuse can be a big problem in a community, and you want to help people learn about it.
Before you start creating your campaign, it's important to research what is going on with ATOD abuse in your community.
1. Using local news media sources, find five news stories related to ATOD abuse in your community. For each news story, identify a barrier that prevented the person or people involved from making better decisions regarding ATOD use.

Answers

1. Hailey Hesch started using dr#gs when she was 12 years old. She experimented with a lot of hardcore dr#gs like h3roin. A barrier that prevented her from stopping her addiction to the feeling she got when she took dr#gs. She said it made her feel amazing and really happy.

2. Jeremy B smoked a lot of w33d, drank, fought people, and chased girls around with his friends frequently. After a while, he started to use and experiment with other dr#gs like h3roin and d0pe. A barrier that prevented him from making healthier choices was due to curiosity.  

3. Kristina started her dr#g addiction with painkillers she took for an injury. She took them as they were prescribed at first, but after losing an opportunity to get a scholarship, she started abusing the painkillers. However, the painkillers were not enough, so she started using hardcore dr#gs to try to reach a "High". Nothing worked so then she kept abusing them more and more. She noticed that she was becoming very unstable, so she forced herself to get treatment. A barrier that prevented her from making better decisions was because she was blinded by grief and anger.

4. Adam was a 27 year old who was very athletic and smart. No one would have seen it coming, but he died due to a dr#g overdose. There was no one in his entire family that knew about his addiction, and when they found out, it was too late. A barrier that made him addicted is unknown, but some people suspect that it was because of friends or outside influences.

5. Cassie was a smart and successful woman who was very well-rounded. She went to church, donated to charities, and helped children with activities like tutoring and basketball. However, her parents started noticing unusual behavior from her. She shut herself off, had intense mood swings, and looked physically exhaused. Their suspicions were confirmed when she collapsed in the middle of the day. The doctor's diagnosis stated that she overdosed on m3th and that she was in a permanent coma. Later, the doctor broke the awful news to her parents, Cassie had irreversible brain damage and was a lost cause, so she died after being taken off of life support. A barrier that prevented her from making better choices was that no one took action when her behaviour drastically changed.

mapa mental sobre El origen de las especies

Answers

El origen de las especies, cuya primera edición apareció en 1859, es el libro más conocido de El biólogo británico Charles Darwin. En el libro, Darwin expone su teoría de la evolución:

Afirma que toda la vida en la Tierra tiene un ancestro común. Que la selección natural es el mecanismo principal para la evolución de las especies.

El libro está considerado como una de las obras científicas más importantes de la historia. Causó revuelo en el momento de su publicación porque atribuyó la riqueza de la forma de vida en la Tierra a un proceso mecánico más que a una inteligencia sobrenatural. Es cierto que otros habían sugerido previamente que podría haber cosas como la evolución o la selección natural, pero "El origen de las especies" es el primer trabajo que extrae la mayor consecuencia de estos conceptos.

Aprende más acerca de este tema en https://brainly.com/question/16994577.

A small GTP-binding protein called ______________ assembles as a ring around the neck of each deeply invaginated coated pit, pinch off the vesicle. After the budding is complete, the coat proteins are removed, and the naked vesicle can fuse with its target membrane.

Answers

Answer:

A small GTP-binding protein called dynamin assembles as a ring around the neck of each deeply invaginated coated pit, pinch off the vesicle. After the budding is complete, the coat proteins are removed, and the naked vesicle can fuse with its target membrane.

Explanation:

Dynamin - may be a GTPase that takes part in an important role in clathrin-dependent endocytosis and other vesicular trafficking processes by acting like a couple of molecular scissors for newly setup vesicles originating from the cell wall.

What is the definition of gene flow?

Answers

Answer:

the transfer of genetic material from one population to another

Explanation:

Gene flow is also known as gene migration. It is the transfer of genetic material from one population to another.

Los Parques Nacionales Naturales de Colombia se caracterizan porque:

1. Sus Ecosistemas no han sido alterados por la explotación y ocupación humana.
2. Son zonas delimitadas por criterios de Geografía Física: como relieve, clima, hidrografía, vegetación y suelos.
3. Allí nacen numerosos Ríos.
4. Satisfacen necesidades de la población.

Answers

Answer:

Explanation:

2. Son zonas delimitadas por criterios de Geografía Física: como relieve, clima, hidrografía, vegetación y suelos.

Sickle-cell anemia is caused by a mutation that changes the second nucleotide of the codon from GAG to GUG. This results in a change of the amino acid from glutamic acid to valine. If the mutation affected the third nucleotide of the codon and changed GAG to GAU then the amino acid would change from a glutamic acid to aspartic acid. Would you predict this change to have the same effect

Answers

Answer:

This change would be predicted to have less effect compared to the change of the amino acid from glutamic acid to valine.

Explanation:

A conservative mutation is a type of mutation that leads to the replacement of one amino acid by another with similar properties. Both glutamic acid and aspartic acid are similar in size and biochemical properties. These amino acids are acidic dicarboxylic acids (i.e., they contain two carboxyl groups or ―COOH). The side chains of both glutamic acid and aspartic acid are similar, with the exception that glutamic acid contains one additional methylene group in its side chain.

Science is not a process, but just a body of facts that
accumulates overtime.
TRUE
FALSE

Answers

Answer:

False

Explanation:

Science is more about gaining knowledge than it is about simply having knowledge. Science is a way of learning about the natural world that is based on evidence and logic. In other words, science is a process, not just a body of facts. Through the process of science, our knowledge of the world advances.

Please help me I dont know the answer

Answers

Rh antigen.

The chart shows that for A and B antigen there is no reaction so the correct answer will be Rh antigen.

Question 7
Another element in the group of alkali metals is lithium (Li). It reacts with water to form lithium
hydroxide (LiOH) and hydrogen gas. Choose the correct balanced chemical equation for this reaction
from the following three options and explain what's wrong with the other two.
1. Li (St H20 (1) — LiOH2 (aq)
2. Li (s) + H20 (1) ► LiOH (aq) + H2 (g)
3. 2Li (s) + 2H20 (1) ► 2LiOH (aq) + H2 (g)
Class Discussion

Answers

Answer: 3 2Li (s) + 2H20 (1) ► 2LiOH (aq) + H2 (g)

Explanation: i think thats the answer :/


Correct answer: 3. 2Li (s) + 2H20 (1) ► 2LiOH (aq) + H2 (g)

Explanation: The other two equations are not balanced. This one is the only balanced one

Which of these statements about photosynthesis is correct?
A.
Both photosynthesis and respiration require the same amount of energy for metabolic processes, such as synthesis and the breakdown of carbohydrates.
B.
Photosynthesis releases energy for metabolism, whereas respiration requires energy for the breakdown of carbohydrates.
C.
Photosynthesis requires energy for the synthesis of carbohydrates, whereas respiration releases energy during the breakdown of carbohydrate

Answers

Answer:

C

Explanation:

What is a hominid? A)a family of tree-swinging monkeys B)a family of baboons C) a family of primates that include humans D) a family of bipedal apes

Answers

Answer:

a family of primates that include humans

Explanation:

select the correct answer from each drop down menu.
both anaerobic and aerobic respiration use __ to produce ATP and NADH

Answers

I dont see the answers for the drop down menu

Write the scientific meaning of the following words listed below:

Word List : Cells, organs, organism, multicellular, unicellular, neuron, impulse, sensory neuron, motor neuron, endocrine system, hormones, stimulus and reflex

Answers

Explanation:

cells : cells are buliding blocks of life .Every living organism is made up of cells

organs : They are a structure made up different tissues working for a specific function.

organism : Any being that respires grows, excretes , moves , reproduce , adapt , needs nuitrition and is sensitive to changes

multicellular: an organism that is made up of more than one cell

unicellular : an organism that is made uo of only one cell

nueron : a nerve cell

impulse : they are just like electrical impulses

sensory nuerons : also known as receptor nuerons .They transmit impulses to central nervous system.

motor nuerons: also knownas motor nueron. They transmit impulses from nervous system to the effectors

hormones : they are chemical substances produced by endocrine glands transported by blood ,alter the activity of one or more targeted organs in the body .

reflex: it is the immediate response to a specific stimulas without conscious control

Diane Dodd raised different fruit fly populations on different food sources. She found that after about 40 generations the evolution of reproductive isolation was under way. The mechanism of evolution responsible for this was Group of answer choices

Answers

Answer:

Natural selection.

Explanation:

Natural selection can be defined as a biological process in which species of living organisms having certain traits that enable them to adapt to environmental factors such as predators, competition for food, climate change, sex mates, etc., tend to survive and reproduce, as well as passing on their genes to subsequent generations.

Simply stated, natural selection entails the survival of the fittest. Therefore, the species that are able to adapt to the environment will increase in number while the ones who can't adapt will die and go into extinction.

In this scenario, the mechanism of evolution responsible for this was natural selection because after about 40 generations the evolution of reproductive isolation was under way for the fruit fly. Thus, the more the offsprings that are reproduced by the parent organism, the more likely are they to survive.

Additionally, there is a better chance of having good or beneficial traits being passed from the parent organism to her offsprings.

When trees are uprooted and the land left bare what happens to the rain water?​

Answers

Explanation:

when trees are cut down, the bare surfaces left behind absorb more heat than the forest they replaced.And that heat helps draw air upward, pulling moist air in from nearby forested land that increases rainfall in the immediate area.

what is the purpose of ethical guidelines for the handling of experimental subjects

Answers

Answer:

The purpose of ethical guidelines for handling of experimental subjects is to ensure the safety and well-being of all living creatures in an experiment. Ethical guidelines include issues such as human rights, animal welfare, safety compliance with the law, conflicts of interest, health standards.

On your first research mission you make an amazing discovery by finding a new species living in the hostile environment of the Sahara desert. After observing it carefully you determine that it is not an autotroph, it is multicellular, and it does not contain any chitin. What is the best classification for it

Answers

Answer:

Animalia

Explanation:

A multicellular organism is an organism composed of two or more cells. Multicellular organisms include animals (i.e., organisms from kingdom Animalia), plants, and most fungi. Moreover, an autotroph is a living organism that can produce its own food by using materials from inorganic sources (e.g., water, carbon dioxide, etc); whereas a heterotroph is an organism that cannot produce its own food and thereby needs to eat other organisms, like plants or animals, to survive. Multicellular autotrophs are typically plants; whereas multicellular heterotrophs include all animals, fungi and some parasitic plants. Finally, chitin is a polysaccharide (polymer) of N-acetylglucosamine, which is found in the cell wall of fungi, as well as in the exoskeleton of some animal groups such as, for example, insects, crustaceans, etc.

Which of the following organisms are most important in biodegradation

bacteria
vultures
omnivores
earthworms

Answers

Answer:

Bacteria

Explanation:

Several microorganisms, including fungi, bacteria and yeasts are involved in biodegradation process.

Answer is bacteria gusutsufsugsjgxgidufsufsursufz

All of the following are arguments used by global warming skeptics except
(A) climate models for global warming have continually been wrong
(B) the dire consequences of global warming have not come pass
(C) earth has natural temperature cycles it goes through
(D) an increase in temperatures would actually be good for the climate

Answers

Explanation:

the answer is b because the consewuences of global warming had not yet pass

Answer:  D

Explanation: No climate change deniers think that climate change is good for the the planet, they just deny that climate change exists

Which activity is a way engineers can control erosion?
O A. Testing a body of water near a building site to make sure that it
can support wildlife
B. Using protective barriers to hold the soil on sites exposed by
construction activities
C. Designing buildings that can be maintained using minimal water
and electricity
D. Looking for soil that contains minerals that bind with particular
pollutants

Answers

Answer:

B. Using protective barriers to hold the soil sites exposed by construction activities.

1. Most students in Britain take the GCSE when ____________.

A. They are 11 years old

B. They are 16 years old

C. They finish grade 10

D. They begin grade 11

2. What is the first thing you’ll notice when you visit almost any school in Britain?

A. The school logo

B. The school gate

C. The school playground

D. The school uniform

3. What do most teenagers in Britain prefer to wear?

A. Trendy labels

B. Expensive uniforms

C. Fashionable hats

D. Economical trainers

4. The word ‘highlight’ in paragraph 2 is closest in meaning to __________ .

A. Confuse

B. Remark

C. Emphasise

D. Decrease

5. According to the passage, which of the following statements is NOT true?

A. Students in Britain can take 8 subjects at the GCSE.

B. Most British teenagers spend 2-3 hours watching TV after school.

C. Most 16-year-old students in Britain don’t like school uniforms.

D. Many British teenagers judge their friends by their shirts or trainers.

Answers

Answer:

1.c

2.d

3 .d

4.a

5.c

this is all I got

Given a biochemical pathway where substrate A is converted to product B which is converted to product C which is converted to product D which is finally converted to product E, how many enzymes are likely to be involved in the sequence to form product E

Answers

Answer:

Four

Explanation:

An enzyme is used in each stage;

From A to B

B to C

C to D and finally D to E

What components does the chemical level include

Answers

Answer:

The chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules.

Explanation:

This is the correct answer I hope this helps you out!

So To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules. All matter in the universe is composed of one or more unique pure substances called elements

The movement of oxygen from the alveoli into pulmonary capillaries and carbon dioxide from pulmonary capillaries to the alveoli is: Select one: a. Internal Respiration b. External Respiration c. Pulmonary Respiration d. None of the above.

Answers

Answer:

External Respiration.

Explanation:

External Respiration is the type of respiration in which exchanges of gases occurs between the lungs and the bloodstream i.e. pulmonary capillaries. Inside the lungs, oxygen is loaded into the hemoglobin and carbon dioxide waste is unloaded, this process is called external respiration. This respiratory process takes place through the help of hundreds of millions of microscopic alveoli.

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